some simple questions about java...
well, here are my questions:
1. is it ok if i connect to database (Statement st = cn.createStatement()) and
then after I fetch the resultset, I don't close it (st.close()) ? will it slow down
the connection to the database? because in my program, there is some
create statement lines, and I never use st.close.
2. if I use many ArrayLists, will they slow my program? because I think
ArrayList is better than the normal  array.
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